patch 8.2.2121: internal error when using \ze before \zs in a pattern
Problem: Internal error when using \ze before \zs in a pattern.
Solution: Check the end is never before the start. (closes #7442)
diff --git a/src/regexp_bt.c b/src/regexp_bt.c
index 03b07a1..476f34e 100644
--- a/src/regexp_bt.c
+++ b/src/regexp_bt.c
@@ -4805,6 +4805,23 @@
if (backpos.ga_maxlen > BACKPOS_INITIAL)
ga_clear(&backpos);
+ // Make sure the end is never before the start. Can happen when \zs and
+ // \ze are used.
+ if (REG_MULTI)
+ {
+ lpos_T *start = &rex.reg_mmatch->startpos[0];
+ lpos_T *end = &rex.reg_mmatch->endpos[0];
+
+ if (end->lnum < start->lnum
+ || (end->lnum == start->lnum && end->col < start->col))
+ rex.reg_mmatch->endpos[0] = rex.reg_mmatch->startpos[0];
+ }
+ else
+ {
+ if (rex.reg_match->endp[0] < rex.reg_match->startp[0])
+ rex.reg_match->endp[0] = rex.reg_match->startp[0];
+ }
+
return retval;
}